Heat sensitive materials can be concentrated in an evaporator employing_______________?

Related Mcqs:

Presence of a non-condensing gas in a condensing vapour___________________?

A. Increases the rate of condensation B. Decreases thermal resistance C. Is desirable to increase the film co-efficient D. None of these...

A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m2.°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be__________________?

A. Greater than that for un-insulated steam pipe B. Less than that of the un-insulated steam pipe C. Equal to that of the un-insulated steam pipe D. Less than the steam pipe with 5 cms insulation...

Reynold’s analogy states that_________________?

A. Nst α f B. Nst α NRe C. NNu α f D. NRe α f...

Steam side heat transfer co-efficient in an evaporator is in the range of ______________ kcal/hr.m2°C?

A. 10-50 B. 100-500 C. 1000-1500 D. 5000-15000...

Dittus-Boelter equation cannot be used for molten metals mainly due to its very low_____________________?

A. Prandtl number B. Grashoff number C. Thermal conductivity D. Viscosity...